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January 2007 Rev. 11 1/25

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LM117/LM217/LM317

1.2V to 37V Adjustable voltage regulators

Feature summary

Output voltage range: 1.2 to 37V

Output current in excess of 1.5A

0.1% Line and load regulation

Floating operation for high voltages

Complete series of protections: current limiting,

thermal shutdown and SOA control

Description

The LM117/LM217/LM317 are monolithicintegrated circuit in TO-220, TO-220FP, TO-3 andD2PAK packages intended for use as positiveadjustable voltage regulators.

They are designed to supply more than 1.5A ofload current with an output voltage adjustableover a 1.2 to 37V range.

The nominal output voltage is selected by meansof only a resistive divider, making the deviceexceptionally easy to use and eliminating thestocking of many fixed regulators.

TO-220FP

D2PAK

TO-220

TO-3

www.st.com

Order code

Part numberPackage

TO-220 D2PAK TO-220FP TO-3

LM117 LM117K

LM217 LM217T LM217D2T LM217K

LM317 LM317T LM317D2T LM317P LM317K
http://www.st.com/http://www.st.com/


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LM117/LM217/LM317

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Contents

1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24


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LM117/LM217/LM317 Pin configuration

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1 Pin configuration

Figure 1. Pin connections (top view)

TO220FP

TO-3

TO-220

D2PAK (Any Type)


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LM117/LM217/LM317 Diagram

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3 Diagram

Figure 2. Schematic diagram


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Electrical characteristics LM117/LM217/LM317

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4 Electrical characteristics

Table 3. Electrical characteristics for LM117/LM217 (VI - VO= 5 V, IO= 500 mA, IMAX= 1.5 A and

PMAX= 20 W, TJ= -55 to 150C for LM117, TJ= -25 to 150C for LM217, unless otherwise

specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

VO Line regulation VI- VO= 3 to 40 VTJ= 25C 0.01 0.02

%/V0.02 0.05

VO Load regulation

VO5 V

IO= 10 mA to IMAX

TJ= 25C 5 15mV

20 50

VO5 V,

IO= 10 mA to IMAX

TJ= 25C 0.1 0.3%

0.3 1

IADJ Adjustment pin current 50 100 A

IADJ Adjustment pin current VI- VO= 2.5 to 40V IO= 10 mA to IMAX 0.2 5 A

VREFReference voltage

(between pin 3 and pin 1)

VI- VO= 2.5 to 40V IO= 10 mA to IMAXPDPMAX

1.2 1.25 1.3 V

VO/VOOutput voltage

temperature stability1 %

IO(min) Minimum load current VI- VO = 40 V 3.5 5 mA

IO(max) Maximum load currentVI- VO15 V, PD


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LM117/LM217/LM317 Electrical characteristics

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Table 4. Electrical characteristics for LM317 (VI - VO= 5 V, IO= 500 mA, IMAX= 1.5 A and

PMAX= 20 W, TJ= 0 to 125C, unless otherwise specified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

VO Line regulation VI- VO= 3 to 40 VTJ= 25C 0.01 0.04

%/V0.02 0.07

VO Load regulation

VO5 V

IO= 10 mA to IMAX

TJ= 25C 5 25mV

20 70

VO5 V,

IO= 10 mA to IMAX

TJ= 25C 0.1 0.5%

0.3 1.5

IADJ Adjustment pin current 50 100 A

IADJ Adjustment pin current VI- VO= 2.5 to 40V IO= 10 mA to IMAX 0.2 5 A

VREFReference voltage

(between pin 3 and pin 1)

VI- VO= 2.5 to 40V IO= 10 mA to IMAX

PDPMAX1.2 1.25 1.3 V

VO/VOOutput voltage

temperature stability1 %

IO(min) Minimum load current VI- VO = 40 V 3.5 10 mA

IO(max) Maximum load currentVI- VO15 V, PD


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Typical characteristics LM117/LM217/LM317

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5 Typical characteristics

Figure 3. Output current vs input-output

differential voltage

Figure 4. Dropout voltage vs junction

temperature

Figure 5. Reference voltage vs junction

Figure 6. Basic adjustable regulator


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LM117/LM217/LM317 Application information

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6 Application information

The LM117/217/317 provides an internal reference voltage of 1.25V between the output and

adjustments terminals. This is used to set a constant current flow across an external resistordivider (see Figure 3.), giving an output voltage VOof:

VO= VREF(1 + R2/R1) + IADJR2

The device was designed to minimize the term IADJ(100A max) and to maintain it veryconstant with line and load changes. Usually, the error term IADJ R2can be neglected. Toobtain the previous requirement, all the regulator quiescent current is returned to the outputterminal, imposing a minimum load current condition. If the load is insufficient, the outputvoltage will rise. Since the LM117/217317 is a floating regulator and "sees" only the input-to-output differential voltage, supplies of very high voltage with respect to ground can beregulated as long as the maximum input-to-output differential is not exceeded. Furthermore,programmable regulator are easily obtainable and, by connecting a fixed resistor between

the adjustment and output, the device can be used as a precision current regulator. In orderto optimize the load regulation, the current set resistor R1(see Figure 3.) should be tied asclose as possible to the regulator, while the ground terminal of R2should be near the groundof the load to provide remote ground sensing. Performance may be improved with addedcapacitance as follow:

An input bypass capacitor of 0.1F

An adjustment terminal to ground 10F capacitor to improve the ripple rejection of about 15dB (CADJ).

An 1F tantalum (or 25F Aluminium electrolytic) capacitor on the output to improvetransient response. In additional to external capacitors, it is good practice to add protectiondiodes, as shown in Figure 4.D1 protect the device against input short circuit, while D2

protect against output short circuit for capacitance discharging.

Note: D1 protect the device against input short circuit, while D2 protects against output shortcircuit for capacitors discharging.

Figure 7. Voltage regulator with protection diodes


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LM117/LM217/LM317 Application information

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(R2sets maximum VO)

* RSsets output impedance of charger ZO= RS(1 + R2/R1). Use of RSallows low charging rates whit fullycharged battery.

Figure 11. Digitally selected outputs

Figure 12. Battery charger (12V)


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Application information LM117/LM217/LM317

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* R3 sets peak current (0.6A for 1 0).

** C1 recommended to filter out input transients.

Figure 13. Current limited 6V Charger


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LM117/LM217/LM317 Package mechanical data

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7 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK

packages. These packages have a Lead-free second level interconnect. The category ofsecond Level Interconnect is marked on the package and on the inner box label, incompliance with JEDEC Standard JESD97. The maximum ratings related to solderingconditions are also marked on the inner box label. ECOPACK is an ST trademark.ECOPACK specifications are available at: www.st.com.


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Package mechanical data LM117/LM217/LM317

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DIM. mm. inchMIN. TYP MAX. MIN. TYP. MAX.

A 11.85 0.466

B 0.96 1.05 1.10 0.037 0.041 0.043

C 1.70 0.066

D 8.7 0.342

E 20.0 0.787

G 10.9 0.429

N 16.9 0.665

P 26.2 1.031

R 3.88 4.09 0.152 0.161

U 39.5 1.555

V 30.10 1.185

TO-3 MECHANICAL DATA

P003C/C

E

B

R

C

DAP

G

N

VU

O


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DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 4.40 4.60 0.173 0.181

b 0.61 0.88 0.024 0.034

b1 1.15 1.70 0.045 0.067

c 0.49 0.70 0.019 0.027

D 15.25 15.75 0.600 0.620

E 10.0 10.40 0.393 0.409

e 2.4 2.7 0.094 0.106

e1 4.95 5.15 0.194 0.203

F 1.23 1.32 0.048 0.051

H1 6.2 6.6 0.244 0.260

J1 2.40 2.72 0.094 0.107

L 13.0 14.0 0.511 0.551

L1 3.5 3.93 0.137 0.154

L20 16.4 0.645

L30 28.9 1.138

P 3.75 3.85 0.147 0.151

Q 2.65 2.95 0.104 0.116

TO-220 (A TYPE) MECHANICAL DATA

0015988/N


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DIM. mm. inchMIN. TYP MAX. MIN. TYP. MAX.

A 4.30 4.70 0.169 0.185

b 0.70 0.90 0.028 0.035

b1 1.42 1.62 0.056 0.064

c 0.45 0.60 0.018 0.024

D 15.70 0.618

E 9.80 10.20 0.386 0.402

e 2.54 0.100

e1 5.08 0.200

F 1.25 1.39 0.049 0.055

H1 6.5 0.256

J1 2.20 2.60 0.087 0.202

L 12.88 13.28 0.507 0.523

L1 3 0.118

L20 15.70 16.1 0.618 0.634

L30 28.9 1.138

P 3.50 3.70 0.138 0.146

Q 2.70 2.90 0.106 0.114

TO-220 (C TYPE) MECHANICAL DATA

0015988/N


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DIM.

mm. inch


A 4.47 4.67 0.176 0.184

b 0.70 0.91 0.028 0.036

b1 1.17 1.37 0.046 0.054

c 0.31 0.53 0.012 0.021

D 14.60 15.70 0.575 0.618

E 9.96 10.36 0.392 0.408

e 2.54 0.100

e1 5.08 0.200

F 1.17 1.37 0.046 0.054

H1 6.1 6.8 0.240 0.268

J1 2.52 2.82 0.099 0.111

L 12.70 13.80 0.500 0.543

L1 3.20 3.96 0.126 0.156

L20 15.21 16.77 0.599 0.660

P 3.73 3.94 0.147 0.155

Q 2.59 2.89 0.102 0.114

TO-220 (E TYPE) MECHANICAL DATA

7655923/A


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Figure 14. DRAWING DIMENSION D2PAK (TYPE STD-ST)

0079457/L


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Figure 15. DRAWING DIMENSION D2PAK (TYPE WOOSEOK-SUBCON.)

0079457/L


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Figure 16. D2PAK FOOTPRINT RECOMMENDED DATA

Table 6. FOOTPRINT DATA

VALUES

mm. inch.

A 12.20 0.480

B 9.75 0.384

C 16.90 0.665

D 3.50 0.138

E 1.60 0.063

F 2.54 0.100

G 5.08 0.200


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DIM.

mm. inch


A 180 7.086

C 12.8 13.0 13.2 0.504 0.512 0.519

D 20.2 0.795

N 60 2.362

T 14.4 0.567

Ao 10.50 10.6 10.70 0.413 0.417 0.421

Bo 15.70 15.80 15.90 0.618 0.622 0.626

Ko 4.80 4.90 5.00 0.189 0.193 0.197

Po 3.9 4.0 4.1 0.153 0.157 0.161

P 11.9 12.0 12.1 0.468 0.472 0.476

Tape & Reel D2PAK-P2PAK-D2PAK/A-P2PAK/A MECHANICAL DATA


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Revision history LM117/LM217/LM317

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8 Revision history

Table 7. Revision history

Date Revision Changes

01-Sep-2004 10 Mistake VREF==> VO, tables 1, 4 and 5.

19-Jan-2007 11D2PAK mechanical data has been updated, add footprint data and the

document has been reformatted.


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LM117/LM217/LM317

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